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That being said, I'm pretty sure WD-40 is a no no for chains. I'm not sure exactly why, but I think it's just too thin and can "clean out" the good lubricant, no? Maybe bad for the seals?



WD-40 is fine, just don't soak the chain in it, wet and wipe. It's 51% Stoddard solvent (per the MSDS) which is essentially mineral spirits.
Soaking (immersion) for long periods could damage the seals but the small amount and short duration of use for cleaning won't do any harm at all.

Contra todo mal, mezcal; contra todo bien, también